eggs

They don't, unless the scrambled egg was made using milk or cooked in oil.

​They may differ by the stated size of the eggs (such as medium or large), but they don't by weight.

100g Egg, whole, cooked, scrambled = 149 Calories [1]
100g Egg, whole, cooked, hard-boiled = 155 Calories [2]

References:
[1] USDA, Basic Report: 01132, Egg, whole, cooked, scrambled, http://ndb.nal.usda.gov/ndb/foods/show/121
[2] USDA, Basic Report: 01129, Egg, whole, cooked, hard-boiled, http://ndb.nal.usda.gov/ndb/foods/show/118

Hmmmm. I don't understand it exactly with the eggs but I assume it is because once you break it and cook it, it loses some nutrients and therefore calories through evaporation or residue in the pan maybe that being enclosed in the shell doesn't lose. The amount of heat probably changes the composition, too. The poached is even less calories because of the water carrying away some of the nutrients. I can't figure the raw though.

With a starch it is easier to understand: A baked potato has more calories than a boiled because you are boiling away some of the starch which goes into the water. It must be something like that.

threadmad wrote: »

Whaaaat??? This totally floored me, so I checked the USDA food list. All kcals are per 100 grams:
Egg, whole, cooked, hard-boiled 155 kcals
Egg, whole, cooked, scrambled 149 kcals
Egg, whole, cooked, poached 143 kcals
Egg, whole, raw, fresh 143 kcals

I'm baffled!

@threadmad these numbers are functionally equal plus they are just guesstimations but should be correct within 10% +/- I expect. In the real world this is a non issue because we are just guessing at the number of calories we need to eat and how many we burn.

Weighing on a good set of scales is the only absolute way we know the net results of our eating, exercise, etc.

mrst0 wrote: »

gotcha, thanks all, however my fitness pal says there is quite a difference in boiled or scrambled

It depends on the entry you're looking at. The two I pulled up were equal.

ETA: with user based entries it's going to vary as the size of the eggs used vary from type to type and egg to egg. Still the difference is negligible.

All measuring tools have a margin of error. If the bomb calorimeter used to measure the calories has an error of +/-5%, a measurement of 100kcals could be anywhere from 95-105 kcals in actuality. 5 kcals difference is really meaningless. Everything is really just an estimate. The only way to really judge is to keep using the same value entries from the database and adjust your intake up or down to match the rate of loss (or gain) you're trying to achieve.